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EOS Invisio XL

underbench sauna heater

Special sauna heater for concealed installations under the sauna benches.

EOS Invisio is a special range of the unique concealed „underbench“ sauna heaters, which are installed under the sauna benches with a partition wall with only a 10 cm gap to the main sauna wall.

Thanks to their construction and particular installation, EOS Invisio heaters offer high safety standards and save a lot of valuable space in the cabin. There is no more risk of accidentally touching the heater and your sauna will look more spacious inside.

In spite of the hidden installation, traditional water splashes are of course still possible. All EOS Invisio heaters include a stainless steel water funnel with a silicone tube. The special gutter inside the heater spreads the water over the entire heater width to ensure quick evaporation.

The EOS Invisio XL is ideal for intensive commercial operations of the Finnish sauna. Extra-large rock store with up to 75 kg volume - optimal for powerful water splashes. The height of the heater may be adjusted +/- 15 cm.

Power Item no.
9,0 kW 945522
12,0 kW 946390
9,0 kW 945816 (Anthracite)
12,0 kW 946391 (Anthracite)


  • High user safety, thanks to the concealed installation.
  • Service-friendly construction.
  • Traditional water splashes on the rocks still possible - water infusion set with stainless steel funnel is included.
  • Includes safety grill - reliable protection against objects falling down on the heater.
  • Optimized heating performance, thanks to the special position of heating elements - for faster heat-up times.
  • Robust construction. Adjustable height (+/- 15 cm).
  • Space-saving design - only 10 cm required for the screen wall.
  • Extra large rock store with up to 75 kg stone volume.

Electrical connection

400 V 3N ~ 50 /60 Hz

Fuse protection (control unit)

3 x 16 A

Dimensions H/W/D, in cm

80 x 116 x 58

For sauna cabin size (9,0 / 12,0 kW)

9 - 14 m³ / 14 - 18 m³

Min. size of air intake and outlet (9,0 / 12,0 kW)

35 x 6 cm / 35 x 7 cm

Weight without stones and packing (9,0 / 12,0 kW)

25,5 kg / 27,5 kg

Stone filling

75 kg

Power extension needed (9,0 / 12,0 kW)

no / LSG 10